Most desirable Harley Davidson?

**pete376403** · 7th March 2011, 22:57

Not a Harley but have you considered using a Britten as the model - being a Christchurch bike and all.

I could go for one of those.

**pete376403** · 7th March 2011, 23:03

Originally Posted by HenryDorsetCase

I thought all XRs had a reversed rear cylinder head so the induction could be on the right and exhaust on the left? I could be wrong and likely am but that looks to have a streetbike motor in it to my untrained eye*.

XRs got two front cylinder heads so they could have dual carbs, among other things. Part of the AMA opening up competition to any 750 regardless of where the valves were (or even no valves at all). Previously the 750s were side valve to the 500s overhead valve.
The first XRs were basically a short stroke 883 Sportster with iron heads and barrels and overheated badly, later XRs got alloy heads and barrels and became very successful on the dirt, less so on the pavement.

**RDjase** · 8th March 2011, 07:11

Originally Posted by pete376403

XRs got two front cylinder heads so they could have dual carbs, among other things. Part of the AMA opening up competition to any 750 regardless of where the valves were (or even no valves at all). Previously the 750s were side valve to the 500s overhead valve.
The first XRs were basically a short stroke 883 Sportster with iron heads and barrels and overheated badly, later XRs got alloy heads and barrels and became very successful on the dirt, less so on the pavement.

So is that when Kenny Roberts TZ750 beast got built and allowed in?

What do you know about the XR1000? My mates one had two front heads as it had duel dellorto's

**nudemetalz** · 8th March 2011, 08:24

Well I have my XR750 pic that I'm going to base the CAD from and have now decided on for the other as.......................................
.
.
.
.
.
.
Captain America's Harley chopper from Easy Rider.

The CNC routering may prove a challenge with the long thin forks and sissy bar but cross that hurdle when we get to it.

Originally Posted by pete376403

Not a Harley but have you considered using a Britten as the model - being a Christchurch bike and all.

I could go for one of those.

Would probably have copyright issues with doing one of those as have considered it.

**White trash** · 8th March 2011, 09:29

http://www.trademe.co.nz/Trade-Me-Mo...-358332812.htm

Nice job.

**Crasherfromwayback** · 8th March 2011, 09:35

A GC for the donation side of things too.

**HenryDorsetCase** · 8th March 2011, 10:24

Originally Posted by White trash

http://www.trademe.co.nz/Trade-Me-Mo...-358332812.htm

Nice job.

I've seen that bike in the flesh. Its very well built and sounds cool as hell.

WANT.

**Motu** · 8th March 2011, 11:46

Originally Posted by RDjase

So is that when Kenny Roberts TZ750 beast got built and allowed in?

Shell Thuet was building Kenny's bikes,they were 750,and even with a special one off head they were hard pressed to catch the XR's on a mile.Kel Caruthers built the TZ750 just for the last race of the season,it was win or lose for Kenny.One of the most famous rides in history.Hard to ride at the time,but unsorted and on Pirelli MT53 tyres,these days with 30 years to sort it and on K180 tyres,even an old man can ride it....if that old man is Kenny Roberts.Multi cyl bikes were banned after that,a good thing at the time because a multi is very hard to control sideways at 160kph on a loose surface.

The narrow crank V twin has advantages on the dirt track,and until Honda built a 45 degree aircooled dry sump V twin with the same bore and stroke as the XR750 no bike could really get near it.Now a Ninja 650 can beat them on the Mile....but built by the best XR750 tuner there has ever been.

**HenryDorsetCase** · 8th March 2011, 12:47

Originally Posted by Motu

Shell Thuet was building Kenny's bikes,they were 750,and even with a special one off head they were hard pressed to catch the XR's on a mile.Kel Caruthers built the TZ750 just for the last race of the season,it was win or lose for Kenny.One of the most famous rides in history.Hard to ride at the time,but unsorted and on Pirelli MT53 tyres,these days with 30 years to sort it and on K180 tyres,even an old man can ride it....if that old man is Kenny Roberts.Multi cyl bikes were banned after that,a good thing at the time because a multi is very hard to control sideways at 160kph on a loose surface.

The narrow crank V twin has advantages on the dirt track,and until Honda built a 45 degree aircooled dry sump V twin with the same bore and stroke as the XR750 no bike could really get near it.Now a Ninja 650 can beat them on the Mile....but built by the best XR750 tuner there has ever been.

you obviously follow that form of racing pretty closely: keen to share any interweb linkys and stuff? I love to watch it, and stuff like Kennys Springfield Mile and stuff.

Cheers

**Motu** · 8th March 2011, 16:43

40 years of it - I saw On Any Sunday which followed the 1970 season,and was blown away by the speed those guys rode in the loose on street tyres.I also had Petersons Sports Quarterly which also had a detailed report of the 1970 season...I was just hooked.

There is the Flattrack Forum,with the real guys on there,and some good history and photos.http://www.flattrack.com/index.php?o...board&Itemid=0

There is a really good thread on ADVrider that's been going for a few years,it's photos,but some good background info too.There are some other good threads on ADVrider too,but might take some finding....often something comes up in the racing section.I have a large collection of flattrack photos - if I see anything flattrack I click save as....

http://www.advrider.com/forums/showthread.php?t=272954

**BIG DOUG** · 8th March 2011, 17:54

Had the pleasure of meeting Mert Lawrill in 96 very nice guy he was building mountain bikes then.

**Crasherfromwayback** · 8th March 2011, 19:17

Originally Posted by Motu

40 years of it - I saw On Any Sunday which followed the 1970 season,and was blown away by the speed those guys rode in the loose on street tyres.I also had Petersons Sports Quarterly which also had a detailed report of the 1970 season...I was just hooked.

There is the Flattrack Forum,with the real guys on there,and some good history and photos.http://www.flattrack.com/index.php?o...board&Itemid=0

There is a really good thread on ADVrider that's been going for a few years,it's photos,but some good background info too.There are some other good threads on ADVrider too,but might take some finding....often something comes up in the racing section.I have a large collection of flattrack photos - if I see anything flattrack I click save as....

http://www.advrider.com/forums/showthread.php?t=272954

Nice work...thanks for all of the links etc!

**ellipsis** · 8th March 2011, 20:15

...bit of homegrown FT racing..me and my mates at Ashburton Speedway a few years back...a car track come spud paddock type of track...not half as flash and half as fast...but as much fun...